protected override Size ArrangeOverride(Size finalSize)
{
if (plotter == null)
{
return(finalSize);
}
var transform = plotter.Viewport.Transform;
overallViewportBounds = DataRect.Empty;
foreach (UIElement child in InternalChildren)
{
if (child != null)
{
if (child.Visibility != Visibility.Visible)
{
continue;
}
Rect bounds = GetElementScreenBounds(transform, child);
child.Arrange(bounds);
UniteWithBounds(transform, bounds);
}
}
if (!InBatchAdd)
{
Viewport2D.SetContentBounds(this, overallViewportBounds);
ContentBoundsChanged.Raise(this);
}
return(finalSize);
}
public override void EndBatchAdd()
{
base.EndBatchAdd();
if (plotter == null)
{
return;
}
overallViewportBounds = DataRect.Empty;
if (Children.Count > 0 && invalidatePositionCalls == 0)
{
var transform = plotter.Viewport.Transform.WithScreenOffset(-translateTransform.X, -translateTransform.Y);
foreach (FrameworkElement child in Children)
{
if (child != null)
{
if (child.Visibility != Visibility.Visible)
{
continue;
}
Rect bounds = GetElementScreenBounds(transform, child);
UniteWithBounds(transform, bounds);
}
}
}
Viewport2D.SetContentBounds(this, overallViewportBounds);
ContentBoundsChanged.Raise(this);
}
private void UpdateContentBounds(bool recalculate)
{
if (recalculate)
{
var transform = plotter.Viewport.Transform.WithScreenOffset(-translateTransform.X, -translateTransform.Y);
overallViewportBounds = DataRect.Empty;
foreach (FrameworkElement child in Children)
{
if (child != null)
{
if (child.Visibility != Visibility.Visible)
{
continue;
}
Rect bounds = GetElementScreenBounds(transform, child);
UniteWithBounds(transform, bounds);
}
}
}
if (useContentBounds)
{
Viewport2D.SetContentBounds(this, overallViewportBounds);
ContentBoundsChanged.Raise(this);
}
}
protected override void InvalidatePosition(FrameworkElement child)
{
invalidatePositionCalls++;
if (viewport == null)
{
return;
}
if (child.Visibility != Visibility.Visible)
{
return;
}
var transform = viewport.Transform;
Size elementSize = GetElementSize(child, AvailableSize, transform);
child.Measure(elementSize);
Rect bounds = GetElementScreenBounds(transform, child);
child.Arrange(bounds);
var viewportBounds = Viewport2D.GetContentBounds(this);
if (!viewportBounds.IsEmpty)
{
overallViewportBounds = viewportBounds;
}
UniteWithBounds(transform, bounds);
if (!InBatchAdd)
{
Viewport2D.SetContentBounds(this, overallViewportBounds);
ContentBoundsChanged.Raise(this);
}
}